I do wish I spoke, or at least read, the Thai language. I have deep suspicions that the subtitles to this series leave something to be desired. And that's a pity, because the storyline is strong. I do like the way in which the threads involving both main characters are introduced and come together from the very first episode.
I've read a few opinions to the effect that "Unforgotten Night" is a weak production, but I do not agree. It's an intriguing production, and, coming on the heels of the outstanding and expensive "KinnPorsche the Series", holds its own very well indeed. There are one or two clumsy moments when, for example in the forecourt of the MC's mansion, a fleeting corner shot shows a camera crew at work (Episode 4 or 5, as one remembers), but these can be accepted, and one imagines that the editors will learn from them.
One of the particularly strong aspects of "Unforgotten Night" is the casting and the general power of the characterisation. From the outset, both main characters demand full audience attention, while the supporting cast, from the largest to the smallest role, are all excellent performers.
They say that working with animals is difficult. You can lose all control of the audience because of "cuteness", and this is very true of "Unforgotten Night", with its inclusion of two excellently trained Bengal tigers. I don't intend to insert a spoiler here, but the look on the face of one of the animals (I think it's a female) when it first spots one of the MCs definitely says: "Pork chop, and it's mine..." No-one should miss this scene.
"Unforgotten Night" reveals the full range of interpersonal conflicts, and the characters continue to develop their individual stories throughout the action in a highly satisfactory manner. Bodyguards can easily become nothing more than stock figures, but in "Unforgotten Night", the main bodyguards take a strong part in the development of the story line, to the extent that one cannot avoid becoming curious about their second-level stories as integral parts of the plot.
The two main characters, Yoon Phusanu Wongsavanischakorn and Ton Saran Anantasetthakul, are powerful throughout, neither dominating over the other, but both showing a personal strength and individual determination which is probably one of the strongest aspects of "Unforgotten Night".
I will be very sorry when this series ends, but it has a definite and very strong re-watch value, which will be of some comfort.